Just thought I would post some pics, I had only seen these in books.
Wow, not mine but very interesting

Mr. Hans E. Pfingsten’s book suggests Martin was a successor of the original Rheeb designer of this push button trigger. So I guess this is not the Kaiser’s gun?

Last year, I saw a Winchester Model 99 .22 rimfire that had a thumb trigger. They are pretty rare, so obviously the idea didn't catch on in the U.S. either. I could see them being a potential problem with tang safeties being so prevalent. A natural, almost subconscious push to release what you thought was the safety would fire the gun.

Always interesting guns! Wrote about one on my blog:

http://www.hunting-heritage.com/blog/index.php/2016/05/23/push-not-pull-a-rare-ou-of-e-martin-bonn/

Would be interesting to have a better picture of the inscription on top!?

Cheers,
Gubnwolf

Wow never seen such a thing.